CN104943131A - Three-five layer coextrusion polyolefin environment-friendly thermal shrink film processing technology - Google Patents
Three-five layer coextrusion polyolefin environment-friendly thermal shrink film processing technology Download PDFInfo
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Abstract
The invention relates to an environment-friendly thermal shrink film processing technology, and belongs to the technical field of novel plastic packaging materials. The five-layer coextrusion polyolefin environment-friendly thermal shrink film processing technology comprises the following steps: conveying a resin raw material into different extruders respectively, plasticizing at high temperature (of 175 DEG C-180 DEG C) and high pressure, entering a co-extruder head, entering a molding water jacket after molding by a film pipe, and cooling at the temperature of 26 DEG C for molding. The five-layer coextrusion polyolefin environment-friendly thermal shrink film processing technology is relatively superior in performance, namely relatively high in comprehensive performance; a processed heat shrink film has the characteristics of high transparency, high stretching intensity, good flexibility, high shrinkage and the like.
Description
Technical field
The present invention relates to the processing technology of environment-friendly type heat shrink films, belong to New Plastic Packing Materials technical field.
Background technology
(POF-C3, POF-C5) is the New Plastic Packing Materials of Italian the nineties exploitation, there is international most advanced level, POF is exactly the meaning of heat shrink films, the multi-layer co-extruded Polyolefin Heat Shrinkable Film of POF full name, it poly-for linea low density alkene (LLDPE) and COPP is plastified by three, five extruders to extrude, then the special process such as, bubble blown shaping through die head processes.Product has asepsis environment-protecting, meets U.S. FDA and USDA standard, toxic gas can not be discharged during heat-sealing, waste material recoverable, the high grade of transparency, high shrinkage, good heat sealability, surface gloss is high, good toughness, tearing toughness are large, thermal contraction is even and the feature such as applicable fully automatic high-speed packaging, be the regeneration product of conventional P VC heat shrink films, be widely used in the product external packagings such as food and drink, medicine, drinks, electrical and electronic product, toy, stationery, books and periodicals audio-visual product, cosmetics, handicraft, commodity at present.Especially the shrinkage character of its excellence, becomes the first-selected product of assembly package.Complete in specifications, thickness 13-30 micron, width, length can be customized according to customer requirement; The shrink pack pack, shrink film bag, cylinder material film, sheet material, coiled material etc. of supporting specification can be produced according to product needed.
POF heat shrink films adopts high-polymer molecular chain stretch orientation principle design, shaping with the method for chilling sizing.Its physical principle is: when high polymer is in elastomeric state, to its stretch orientation, then by below high polymer quenching to vitrification point, molecularly oriented is frozen, when carrying out heating it in packaging process to article, because molecular motion produces stress relaxation, molecule recovers original state, produces and shrinks.Heat shrink films common in the market has PE shrink film, PVC shrink film, PP shrink film, POF co-extrusion shrink film etc., and in this big family of thermal contraction packaging film, the three-layer co-extruded heat shrink films of POF is a kind of rise gradually in recent years and the novel regeneration product received for people.
POF-C3 thermal contraction packaging film is a kind of multilayer environment protecting nontoxic type heat shrinkable package material produced through coextrusion blow processes for primary raw material with PE and PP.Domestic introducing equipment and raw material production POF-C3 heat shrink films, at present existing tens domestic and international production lines operations and production successively from recent years, growth momentum is good.
POF-C3 series of heat shrinkage packing film purposes is very extensive, meets the world consumption trend of current environment-protecting asepsis completely.This material can not only reduce packaging production cost, the cost of transportation of user, reduce packaging volume, can greatly boost productivity again, also because it has good transparency, the visuality of product can be improved, consumer's sight can be caught rapidly on dog-eat-dog, the supermarket shelf of commodity beautiful jade full day, and cater to that consumer likes convenient, the psychological characteristics saved carries out harness assembly package to commodity, be particularly suitable for the packaging of supermarket commodity and put, thus earned widespread respect at the flourishing consanguinity of America and Europe and applied.Very universal in the packaging applications of the product scopes such as beverage, instant food, cosmetics of everyday use, audio-visual product, books and periodicals, medicine, electronic devices and components, replacement PVC thermal contraction packaging film becomes the main product in heat shrinkable package material substantially.Along with a large amount of exporting is to the progressively raising of packing instructions, and the developing rapidly of domestic supermarket, many production and the wrapping enterprise application quantity to POF-C3 heat shrinkable package film will increase rapidly, and the market prospects of POF-C3 series of heat shrink film are boundless.
The shortcoming that POF-C3 heat shrink films exists mainly contains: 1, transparency is low; 2, hot strength is low, and tearing strength is high; 3, flexibility is poor.Therefore, five-layer co-squeezing heat shrink films becomes the object needing emphasis to research and develop now, but in prior art, the processing technology of five-layer co-squeezing heat shrink films is comparatively complicated, and efficiency is low, cost is high, constrains extensive popularization and the use of five-layer co-squeezing heat shrink films.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide the processing technology of the five-layer co-squeezing polyolefin environment-friendly type heat shrink films that a kind of flexible structure, superior performance, error are little, technique is simple and direct, production efficiency is high.
The present invention is achieved by the following technical solutions:
The processing technology of five-layer co-squeezing polyolefin environment-friendly type heat shrink films, its special character is to comprise the following steps:
(1) resin raw material is sent into different extruders respectively, after HTHP (temperature is 175 DEG C-180 DEG C) plasticizing, enter co-extruding machine head, after the sizing of film pipe, enter sizing water jacket, carry out cooling and shaping (temperature is 26 DEG C);
(2) enter hot stove after sizing to carry out infrared heat (temperature is 170 DEG C-350 DEG C), then enter sizing vane blow molding (upper vane 26.5 DEG C, lower vane 33 DEG C);
(3) by rolling after the product of step (2) employing NDC (online Plastics Thickness Control System) thickness measuring, prefabrication is put into greenhouse and carry out delay process (temperature is 20 DEG C-28 DEG C), cut with cutting machine again, cut the product obtained and send into warehouse.
The processing technology of five-layer co-squeezing polyolefin environment-friendly type heat shrink films of the present invention, has following characteristics: one is can exempt from workman stir reinforced middle error in dipping and stir the irregular instability causing film performance quality; Two is have NDC (online Plastics Thickness Control System) thickness measuring, can greatly reduce film in length and breadth to thickness deviation; Three is to make drawing parameter change with the change of ambient weather, and the external conditions such as auto-compensation environment temperature are on the impact of film; Four is adopt to have five of international advanced level and extrude five-layer co-squeezing technology, the performance of film is had more flexible than three-layer co-extruded structure, performance is more superior, namely the material property that combination property is stronger, the heat shrink films processed has that transparency is high, hot strength is high, flexibility is good, shrinkage high.
Accompanying drawing explanation
Fig. 1: the processing process figure of five-layer co-squeezing polyolefin environment-friendly type heat shrink films of the present invention.
Detailed description of the invention
Further illustrate processing technology provided by the present invention below in conjunction with embodiment, but the present invention is not therefore subject to any restriction.
The processing technology of the five-layer co-squeezing polyolefin environment-friendly type heat shrink films of the present embodiment, comprises the following steps:
(1) resin raw material is sent into different extruders respectively, after HTHP (temperature is 180 DEG C) plasticizing, enter co-extruding machine head, after the sizing of film pipe, enter sizing water jacket, carry out cooling and shaping (temperature is 26 DEG C);
(2) enter hot stove after sizing to carry out infrared heat (temperature is 250 DEG C), then enter sizing vane blow molding (upper vane 26.5 DEG C, lower vane 33 DEG C);
(3) by rolling after the product of step (2) employing NDC (online Plastics Thickness Control System) thickness measuring, prefabrication is put into greenhouse and carry out delay process (temperature is 25 DEG C), cut with cutting machine again, cut the product obtained and send into warehouse.
It should be noted that; above-mentioned specific embodiment is exemplary; of the present invention above-mentioned with under instruction, the various improvement that those skilled in the art can carry out on the basis of above-described embodiment and distortion, and these improve or distortion drops in protection scope of the present invention.
It will be understood by those skilled in the art that the object of specific descriptions just in order to explain this patent above, not for limiting this patent.Protection scope of the present invention is by claim and equivalents thereof.
Claims (1)
1. the processing technology of five-layer co-squeezing polyolefin environment-friendly type heat shrink films, is characterized in that comprising the following steps:
(1) resin raw material is sent into different extruders respectively, after HTHP (temperature is 175 DEG C-180 DEG C) plasticizing, enter co-extruding machine head, after the sizing of film pipe, enter sizing water jacket, carry out cooling and shaping (temperature is 26 DEG C);
(2) enter hot stove after sizing to carry out infrared heat (temperature is 170 DEG C-350 DEG C), then enter sizing vane blow molding (upper vane 26.5 DEG C, lower vane 33 DEG C);
(3) by rolling after the product of step (2) employing NDC (online Plastics Thickness Control System) thickness measuring, prefabrication is put into greenhouse and carry out delay process (temperature is 20 DEG C-28 DEG C), cut with cutting machine again, cut the product obtained and send into warehouse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410138940.7A CN104943131A (en) | 2014-03-31 | 2014-03-31 | Three-five layer coextrusion polyolefin environment-friendly thermal shrink film processing technology |
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| CN201410138940.7A CN104943131A (en) | 2014-03-31 | 2014-03-31 | Three-five layer coextrusion polyolefin environment-friendly thermal shrink film processing technology |
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| CN104943131A true CN104943131A (en) | 2015-09-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216960A (en) * | 2019-06-03 | 2019-09-10 | 黄山永新股份有限公司 | A kind of bloom low haze PE heat shrink films and preparation method thereof |
| CN112549578A (en) * | 2020-12-29 | 2021-03-26 | 苏州双雄新材料股份有限公司 | Preparation process of winding film for industrial packaging |
| CN115179629A (en) * | 2022-07-04 | 2022-10-14 | 山东汇和塑业有限公司 | Polyolefin shrink film with high mechanical properties and chemical stability and method of manufacture |
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| US20080143024A1 (en) * | 2006-12-14 | 2008-06-19 | Wei Chui-Hsian | Method and apparatus for producing polystyrene tubular shrink film via film blow molding |
| CN102205623A (en) * | 2010-12-20 | 2011-10-05 | 福建师范大学 | Method for preparing plastic tank from recycled materials of multi-layer co-extruded high-barrier blown films |
| CN102615836A (en) * | 2012-04-01 | 2012-08-01 | 南通环球塑料工程有限公司 | Preparation method for multi-layer co-extrusion two-way stretched high-barrier plastic casing |
| CN103358634A (en) * | 2013-06-26 | 2013-10-23 | 山东圣和塑胶发展有限公司 | Puncture-resistant five-layer co-extrusion polyester film and preparation method thereof |
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2014
- 2014-03-31 CN CN201410138940.7A patent/CN104943131A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080143024A1 (en) * | 2006-12-14 | 2008-06-19 | Wei Chui-Hsian | Method and apparatus for producing polystyrene tubular shrink film via film blow molding |
| CN102205623A (en) * | 2010-12-20 | 2011-10-05 | 福建师范大学 | Method for preparing plastic tank from recycled materials of multi-layer co-extruded high-barrier blown films |
| CN102615836A (en) * | 2012-04-01 | 2012-08-01 | 南通环球塑料工程有限公司 | Preparation method for multi-layer co-extrusion two-way stretched high-barrier plastic casing |
| CN103358634A (en) * | 2013-06-26 | 2013-10-23 | 山东圣和塑胶发展有限公司 | Puncture-resistant five-layer co-extrusion polyester film and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216960A (en) * | 2019-06-03 | 2019-09-10 | 黄山永新股份有限公司 | A kind of bloom low haze PE heat shrink films and preparation method thereof |
| CN110216960B (en) * | 2019-06-03 | 2021-06-11 | 黄山永新股份有限公司 | High-gloss low-haze PE heat shrinkable film and preparation method thereof |
| CN112549578A (en) * | 2020-12-29 | 2021-03-26 | 苏州双雄新材料股份有限公司 | Preparation process of winding film for industrial packaging |
| CN115179629A (en) * | 2022-07-04 | 2022-10-14 | 山东汇和塑业有限公司 | Polyolefin shrink film with high mechanical properties and chemical stability and method of manufacture |
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Application publication date: 20150930 |